The generator matrix

 1  0  1  1  1  1  1  1  1  0  1  1  1  1  1  1  1  1
 0  1  1  a 7a+7 8a+4 3a+5 8a+5 7a+7  1 8a a+5  0  a a+5 3a+7 3a+7  0
 0  0 3a+6  0 3a+6  3 6a+6 6a+6  3 6a+6  0 3a+3 3a 3a 6a+3  6  6  0
 0  0  0  3 3a+6 3a+6  3 3a 3a 3a+3 6a 3a+3 3a+3 6a+6 6a+6  3 6a+3  3

generates a code of length 18 over GR(81,9) who´s minimum homogenous weight is 117.

Homogenous weight enumerator: w(x)=1x^0+152x^117+144x^120+968x^126+2592x^128+3456x^129+1208x^135+23328x^136+41472x^137+27648x^138+1288x^144+186624x^145+165888x^146+73728x^147+2272x^153+672x^162

The gray image is a code over GF(9) with n=162, k=6 and d=117.
This code was found by Heurico 1.16 in 7.82 seconds.